112 HEPATJCJU. 



1. Blepharostoma trichophyllum (Z.) D/m. 



Lichenastrum trichoides minimum in extremitate JJorens, Dill. Hist. Muse, p. Kif), 



t. 73, f. 37 (1741). 

 Jungermania trichophylla, Linn. Sp. PL p. IGOl (1753); Hook. Brit. Jung. n. 15 



(181G). 

 Blepharostoma trichoijhyllum, Dum. Recueil, p. 18 (1835). 



Paroicous, coespitose or creeping, flagella absent ; small, pale 

 o-reen in colour. Stems procumbent, rootlets few ; subdiclioto- 

 mously branched ; branches few, long, patulous, all lateral. 

 Leaves transverse or very slightly incubous, quadripartite almost 

 to the base, segments hair-like, erect, subparallel, composed of 

 from 8 to 12 uniseriate cells, postical segment a little shorter, 

 middle rarely bifurcate, cells medium to rather large in size, 

 oblong-quadrate, leptodermous, walls thin, no trigones or 

 thickened angles. Stipules about half the size of the leaves, 

 tripartite. Bracts larger than the leaves, deeply quadri- or 

 multifid, basal pagina 4-6 cells high, lobes dichotomous or 

 plurifid, segments filiform, outer bracts less divided, swollen at 

 the base, and containing single small roundish-oval antheridia ; 

 bracteole quadri- or multifid, pagina 3 or 4 cells high. Perianth 

 terminal, highly exserted, white, cells subelongate, composed of 

 one layer of cells, obtusely trigonous, mouth somewhat constricted, 

 laciniate-ciliate, lacinise 4, cilia 30-40, composed of 3 to 6 uni- 

 seriate cells, sometimes furcate and occasionally produced from 

 the upper surface of the perianth. Calyptra delicate, oblong, 

 surrounded at the base by about 5 sterile antheridia. Pedicel 

 elongate. Capsule cylindrical-oblong, valves 4, very thin, com- 

 posed of two layers of cells. Spores very small, smooth, reddish- 

 brown. Elaters very long, narrow, as broad as the spores, bispiral, 

 about 80 turns of the spiral, the whole length of about equal 

 thickness, shnilar in colour to the spores. 



Dimensions. — Stems J to finch long, '1 mm. diameter, with 

 leaves spread out '7 mm. wide ; leaves spread out "5 mm. x '8 mm., 

 cura '45 mm., -5 mm. ; cells '075 mm. x "05 mm. to "04 mm. x 

 •0125 mm.; stipule '35 mm. x *35 mm.; bracts "8 mm., "G mm. 

 x 1" mm., cura "55 mm., "5 mm. ; bracteole 'Q)b mm. x '5 mm.^ 



